package com.sky.service.impl;

import cn.hutool.core.bean.BeanUtil;
import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONArray;
import com.alibaba.fastjson.JSONObject;
import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.context.BaseContext;
import com.sky.dto.*;
import com.sky.entity.*;
import com.sky.exception.AddressBookBusinessException;
import com.sky.exception.OrderBusinessException;
import com.sky.exception.ShoppingCartBusinessException;
import com.sky.exception.UrgeFrequentlyException;
import com.sky.mapper.*;
import com.sky.result.PageResult;
import com.sky.result.Result;
import com.sky.service.OrdersService;
import com.sky.utils.HttpClientUtil;
import com.sky.utils.OrderIdUtil;
import com.sky.utils.WeChatPayUtil;
import com.sky.vo.OrderPaymentVO;
import com.sky.vo.OrderStatisticsVO;
import com.sky.vo.OrderSubmitVO;
import com.sky.vo.OrderVO;
import com.sky.websocket.WebSocketServer;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.math.BigDecimal;
import java.time.LocalDateTime;
import java.util.*;
import java.util.stream.Collectors;

@Service
@Slf4j
public class OrdersServiceImpl implements OrdersService {

    @Value("${sky.shop.address}")
    private String shopAddress;
    @Value("${sky.baidu.ak}")
    private String ak;
    @Autowired
    private OrdersMapper ordersMapper;
    @Autowired
    private AddressBookMapper addressBookMapper;
    @Autowired
    private ShoppingCartMapper shoppingCartMapper;
    @Autowired
    private OrderDetailMapper orderDetailMapper;
    @Autowired
    private WeChatPayUtil weChatPayUtil;
    @Autowired
    private UserMapper userMapper;
    @Autowired
    private WebSocketServer webSocketServer;
    //用户催单等待时间
    public static final Long waitingTime = 60000L;
    //存储用户催单时间
    private static final HashMap<Long,Long> hashMap = new HashMap<>();

    /**
     * 用户下单
     *
     * @param ordersSubmitDTO
     * @return
     */
    @Override
    @Transactional
    public Result<OrderSubmitVO> submit(OrdersSubmitDTO ordersSubmitDTO) {

        //判断地址薄是否为空,空则抛异常
        AddressBook addressBook = addressBookMapper.getById(ordersSubmitDTO.getAddressBookId());
        if (addressBook == null) {
            throw new AddressBookBusinessException(MessageConstant.ADDRESS_BOOK_IS_NULL);
        }

        //检查用户收货地址是否超出配送范围
        checkOutOfRange(addressBook.getCityName()+addressBook.getDistrictName()+addressBook.getDetail());

        //判断购物车是否为空，空则抛异常
        Long userId = BaseContext.getCurrentId();
        ShoppingCart shoppingCart = new ShoppingCart();
        shoppingCart.setUserId(userId);
        List<ShoppingCart> list = shoppingCartMapper.query(shoppingCart);
        if (list == null || list.isEmpty()) {
            throw new ShoppingCartBusinessException(MessageConstant.SHOPPING_CART_IS_NULL);
        }

        //设置订单属性并插入订单表
        String orderId = OrderIdUtil.nextId();
        Orders orders = new Orders();
        BeanUtil.copyProperties(ordersSubmitDTO, orders);
        orders.setNumber(orderId);
        orders.setStatus(Orders.PAID);
        orders.setUserId(userId);
        LocalDateTime time = LocalDateTime.now();
        orders.setOrderTime(time);
        orders.setPayStatus(Orders.UN_PAID);
        orders.setPhone(addressBook.getPhone());
        orders.setAddress(addressBook.getProvinceName() + addressBook.getCityName() +
                addressBook.getDistrictName() + addressBook.getDetail());
        orders.setConsignee(addressBook.getConsignee());
        ordersMapper.save(orders);

        //设置订单详情属性并插入订单详情表
        Long id = orders.getId();
        ArrayList<OrderDetail> orderDetails = new ArrayList<>();
        for (ShoppingCart commodity : list) {
            OrderDetail orderDetail = new OrderDetail();
            orderDetail.setOrderId(id);
            BeanUtil.copyProperties(commodity, orderDetail);
            orderDetails.add(orderDetail);
        }
        orderDetailMapper.save(orderDetails);

        //清空购物车
        shoppingCartMapper.delete(shoppingCart);

        //返回数据给前端
        OrderSubmitVO orderSubmitVO = OrderSubmitVO.builder()
                .id(id)
                .orderNumber(orders.getNumber())
                .orderAmount(ordersSubmitDTO.getAmount())
                .orderTime(time)
                .build();
        return Result.success(orderSubmitVO);
    }

    /**
     * 订单支付
     *
     * @param ordersPaymentDTO
     * @return
     */
    public OrderPaymentVO payment(OrdersPaymentDTO ordersPaymentDTO) throws Exception {
        // 当前登录用户id
//        Long userId = BaseContext.getCurrentId();
//        User user = userMapper.getById(userId);

        //调用微信支付接口，生成预支付交易单
//        JSONObject jsonObject = weChatPayUtil.pay(
//                ordersPaymentDTO.getOrderNumber(), //商户订单号
//                new BigDecimal(0.01), //支付金额，单位 元
//                "苍穹外卖订单", //商品描述
//                user.getOpenid() //微信用户的openid
//        );
//
//        if (jsonObject.getString("code") != null && jsonObject.getString("code").equals("ORDERPAID")) {
//            throw new OrderBusinessException("该订单已支付");
//        }

//        OrderPaymentVO vo = jsonObject.toJavaObject(OrderPaymentVO.class);
//        vo.setPackageStr(jsonObject.getString("package"));
//
//        return vo;
        paySuccess(ordersPaymentDTO.getOrderNumber());
        JSONObject jsonObject = new JSONObject();//本来没有2
        jsonObject.put("code", "ORDERPAID"); //本来没有3
        OrderPaymentVO vo = jsonObject.toJavaObject(OrderPaymentVO.class);
        vo.setPackageStr(jsonObject.getString("package"));
        return vo;
    }

    /**
     * 支付成功，修改订单状态
     * @param outTradeNo
     */
    public void paySuccess(String outTradeNo) {

        // 根据订单号查询订单
        Orders ordersDB = ordersMapper.getByNumber(outTradeNo);

        // 根据订单id更新订单的状态、支付方式、支付状态、结账时间
        Long id = ordersDB.getId();
        Orders orders = Orders.builder()
                .id(id)
                .status(Orders.TO_BE_CONFIRMED)
                .payStatus(Orders.PAID)
                .checkoutTime(LocalDateTime.now())
                .build();

        ordersMapper.update(orders);

        //通过websocket向前端发送消息
        Map<Object,Object> map = new HashMap();
        map.put("type",1);
        map.put("orderId",id);
        map.put("content","订单号:"+outTradeNo);
        String json = JSON.toJSONString(map);
        webSocketServer.sendToAllClient(json);
    }

    /**
     * 查询历史订单
     *
     * @param page
     * @param pageSize
     * @param status
     * @return
     */
    @Override
    public Result<PageResult> pageQuery(int page, int pageSize, Integer status) {

        //分页查询历史订单
        PageHelper.startPage(page, pageSize);
        OrdersPageQueryDTO ordersPageQueryDTO = new OrdersPageQueryDTO();
        ordersPageQueryDTO.setStatus(status);
        ordersPageQueryDTO.setUserId(BaseContext.getCurrentId());
        List<Orders> ordersList = ordersMapper.pageQuery(ordersPageQueryDTO);
        Page<Orders> p = (Page<Orders>) ordersList;

        //设置OrderVO属性，响应给前端
        List<OrderVO> list = new ArrayList<>();
        for (Orders orders : p) {
            Long id = orders.getId();
            List<OrderDetail> orderDetails = orderDetailMapper.selectByOrderId(id);
            OrderVO orderVO = new OrderVO();
            BeanUtil.copyProperties(orders, orderVO);
            orderVO.setOrderDetailList(orderDetails);
            list.add(orderVO);
        }
        return Result.success(new PageResult(p.getTotal(), list));
    }

    /**
     * 查询订单详情
     *
     * @param id
     * @return
     */
    @Override
    public Result<OrderVO> queryDetails(Long id) {

        //查询订单信息
        Orders orders = ordersMapper.selectById(id);

        //查询订单详情
        List<OrderDetail> orderDetails = orderDetailMapper.selectByOrderId(id);

        //设置OrderVO属性并响应给前端
        OrderVO orderVO = new OrderVO();
        BeanUtil.copyProperties(orders, orderVO);
        orderVO.setOrderDetailList(orderDetails);
        return Result.success(orderVO);
    }

    /**
     * 用户取消订单
     *
     * @param id
     * @return
     */
    @Override
    public Result userCancelById(Long id) {

        //查询订单
        Orders ordersDB = ordersMapper.selectById(id);
        if (ordersDB == null) {
            throw new OrderBusinessException(MessageConstant.ORDER_NOT_FOUND);
        }

        //判断订单状态是否满足退款条件
        if (ordersDB.getStatus() > 2) {
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }

        Orders orders = new Orders();
        orders.setId(id);
        //订单处于待接单状态下取消，需要进行退款
        if (ordersDB.getStatus().equals(Orders.TO_BE_CONFIRMED)) {
            //调用微信支付退款接口
//            weChatPayUtil.refund(
//                    ordersDB.getNumber(), //商户订单号
//                    ordersDB.getNumber(), //商户退款单号
//                    new BigDecimal(0.01),//退款金额，单位 元
//                    new BigDecimal(0.01));//原订单金额

            //支付状态修改为 退款
            orders.setPayStatus(Orders.REFUND);
        }

        // 更新订单状态、取消原因、取消时间
        orders.setStatus(Orders.CANCELLED);
        orders.setCancelReason("用户取消");
        orders.setCancelTime(LocalDateTime.now());
        ordersMapper.update(orders);
        return Result.success();
    }

    /**
     * 再来一单
     *
     * @param id
     * @return
     */
    @Override
    public Result repetition(Long id) {

        //查询订单详情
        List<OrderDetail> orderDetails = orderDetailMapper.selectByOrderId(id);

        //获取用户id,创建时间
        Long userId = BaseContext.getCurrentId();
        LocalDateTime time = LocalDateTime.now();

        //将订单详情中的商品转换为购物车中的商品(类型转换)
        List<ShoppingCart> collect = orderDetails.stream().map(s -> {
            ShoppingCart shoppingCart = new ShoppingCart();
            BeanUtil.copyProperties(s, shoppingCart);
            shoppingCart.setUserId(userId);
            shoppingCart.setCreateTime(time);
            return shoppingCart;
        }).collect(Collectors.toList());

        //重新加入购物车
        for (ShoppingCart shoppingCart : collect) {
            shoppingCartMapper.sava(shoppingCart);
        }

        return Result.success();
    }

    /**
     * 订单搜索
     *
     * @param ordersPageQueryDTO
     * @return
     */
    public PageResult conditionSearch(OrdersPageQueryDTO ordersPageQueryDTO) {
        PageHelper.startPage(ordersPageQueryDTO.getPage(), ordersPageQueryDTO.getPageSize());

        List<Orders> ordersList = ordersMapper.pageQuery(ordersPageQueryDTO);
        Page<Orders> page = (Page<Orders>) ordersList;

        // 部分订单状态，需要额外返回订单菜品信息，将Orders转化为OrderVO
        List<OrderVO> orderVOList = getOrderVOList(page);

        return new PageResult(page.getTotal(), orderVOList);
    }

    private List<OrderVO> getOrderVOList(Page<Orders> page) {
        // 需要返回订单菜品信息，自定义OrderVO响应结果
        List<OrderVO> orderVOList = new ArrayList<>();

        List<Orders> ordersList = page.getResult();
            for (Orders orders : ordersList) {
                // 将共同字段复制到OrderVO
                OrderVO orderVO = new OrderVO();
                BeanUtils.copyProperties(orders, orderVO);
                String orderDishes = getOrderDishesStr(orders);

                // 将订单菜品信息封装到orderVO中，并添加到orderVOList
                orderVO.setOrderDishes(orderDishes);
                orderVOList.add(orderVO);
            }
        return orderVOList;
    }

    /**
     * 根据订单id获取菜品信息字符串
     *
     * @param orders
     * @return
     */
    private String getOrderDishesStr(Orders orders) {
        // 查询订单菜品详情信息（订单中的菜品和数量）
        List<OrderDetail> orderDetailList = orderDetailMapper.selectByOrderId(orders.getId());

        // 将每一条订单菜品信息拼接为字符串（格式：宫保鸡丁*3；）
        List<String> orderDishList = orderDetailList.stream().map(s -> s.getName() + "*" + s.getNumber()).collect(Collectors.toList());

        // 将该订单对应的所有菜品信息拼接在一起
        return String.join(",", orderDishList);
    }

    /**
     * 各个状态的订单数量统计
     *
     * @return
     */
    public OrderStatisticsVO statistics() {
        // 根据状态，分别查询出待接单、待派送、派送中的订单数量
        Integer toBeConfirmed = ordersMapper.countStatus(Orders.TO_BE_CONFIRMED);
        Integer confirmed = ordersMapper.countStatus(Orders.CONFIRMED);
        Integer deliveryInProgress = ordersMapper.countStatus(Orders.DELIVERY_IN_PROGRESS);

        // 将查询出的数据封装到orderStatisticsVO中响应
        OrderStatisticsVO orderStatisticsVO = new OrderStatisticsVO();
        orderStatisticsVO.setToBeConfirmed(toBeConfirmed);
        orderStatisticsVO.setConfirmed(confirmed);
        orderStatisticsVO.setDeliveryInProgress(deliveryInProgress);
        return orderStatisticsVO;
    }

    /**
     * 接单
     *
     * @param ordersConfirmDTO
     */
    public void confirm(OrdersConfirmDTO ordersConfirmDTO) {
        Orders orders = Orders.builder()
                .id(ordersConfirmDTO.getId())
                .status(Orders.CONFIRMED)
                .build();

        ordersMapper.update(orders);
    }

    /**
     * 拒单
     *
     * @param ordersRejectionDTO
     */
    public void rejection(OrdersRejectionDTO ordersRejectionDTO) throws Exception {
        // 根据id查询订单
        Orders ordersDB = ordersMapper.selectById(ordersRejectionDTO.getId());

        // 订单只有存在且状态为2（待接单）才可以拒单
        if (ordersDB == null || !ordersDB.getStatus().equals(Orders.TO_BE_CONFIRMED)) {
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }

        //支付状态
//        Integer payStatus = ordersDB.getPayStatus();
//        if (payStatus == Orders.PAID) {
//            //用户已支付，需要退款
//            String refund = weChatPayUtil.refund(
//                    ordersDB.getNumber(),
//                    ordersDB.getNumber(),
//                    new BigDecimal(0.01),
//                    new BigDecimal(0.01));
//            log.info("申请退款：{}", refund);
//        }

        // 拒单需要退款，根据订单id更新订单状态、拒单原因、取消时间
        Orders orders = new Orders();
        orders.setId(ordersDB.getId());
        orders.setStatus(Orders.CANCELLED);
        orders.setRejectionReason(ordersRejectionDTO.getRejectionReason());
        orders.setCancelTime(LocalDateTime.now());

        ordersMapper.update(orders);
    }

    /**
     * 取消订单
     *
     * @param ordersCancelDTO
     */
    public void cancel(OrdersCancelDTO ordersCancelDTO) throws Exception {
        // 根据id查询订单
        Orders ordersDB = ordersMapper.selectById(ordersCancelDTO.getId());

        //支付状态
//        Integer payStatus = ordersDB.getPayStatus();
//        if (payStatus == 1) {
//            //用户已支付，需要退款
//            String refund = weChatPayUtil.refund(
//                    ordersDB.getNumber(),
//                    ordersDB.getNumber(),
//                    new BigDecimal(0.01),
//                    new BigDecimal(0.01));
//            log.info("申请退款：{}", refund);
//        }

        // 管理端取消订单需要退款，根据订单id更新订单状态、取消原因、取消时间
        Orders orders = new Orders();
        orders.setId(ordersCancelDTO.getId());
        orders.setStatus(Orders.CANCELLED);
        orders.setCancelReason(ordersCancelDTO.getCancelReason());
        orders.setCancelTime(LocalDateTime.now());
        ordersMapper.update(orders);
    }

    /**
     * 派送订单
     *
     * @param id
     */
    public void delivery(Long id) {
        // 根据id查询订单
        Orders ordersDB = ordersMapper.selectById(id);

        // 校验订单是否存在，并且状态为3
        if (ordersDB == null || !ordersDB.getStatus().equals(Orders.CONFIRMED)) {
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }

        Orders orders = new Orders();
        orders.setId(ordersDB.getId());
        // 更新订单状态,状态转为派送中
        orders.setStatus(Orders.DELIVERY_IN_PROGRESS);

        ordersMapper.update(orders);
    }

    /**
     * 完成订单
     *
     * @param id
     */
    public void complete(Long id) {
        // 根据id查询订单
        Orders ordersDB = ordersMapper.selectById(id);

        // 校验订单是否存在，并且状态为4
        if (ordersDB == null || !ordersDB.getStatus().equals(Orders.DELIVERY_IN_PROGRESS)) {
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }

        Orders orders = new Orders();
        orders.setId(ordersDB.getId());
        // 更新订单状态,状态转为完成
        orders.setStatus(Orders.COMPLETED);
        orders.setDeliveryTime(LocalDateTime.now());

        ordersMapper.update(orders);
    }

    /**
     * 用户催单
     * @param id
     */
    @Override
    public void reminderOrder(Long id) {
        long time = System.currentTimeMillis();
        //判断用户上次催单时间是否大于1分钟
        if(hashMap.get(id)!=null && time - hashMap.get(id) < waitingTime){
            log.info("用户id{}1分钟内已经催过单了",id);
            throw new UrgeFrequentlyException(MessageConstant.URGE_FREQUENTLY);
        }
        //根据订单id查询订单
        Orders orders = ordersMapper.selectById(id);

        //判断订单是否存在
        if(orders == null){
            throw new OrderBusinessException(MessageConstant.ORDER_NOT_FOUND);
        }

        //判断订单状态
        if(!Objects.equals(orders.getStatus(), Orders.REFUND) || !Objects.equals(orders.getPayStatus(), Orders.PAID)){
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }

        //通过websocket向前端发送消息
        Map<Object,Object> map = new HashMap<>();
        map.put("type",2);
        map.put("orderId",id);
        map.put("content",orders.getNumber());
        String json = JSON.toJSONString(map);
        webSocketServer.sendToAllClient(json);
        hashMap.put(id,time);
    }

    /**
     * 检查客户的收货地址是否超出配送范围
     * @param address
     */
    private void checkOutOfRange(String address) {
        Map<String,String> map = new HashMap<>();
        map.put("address",shopAddress);
        map.put("output","json");
        map.put("ak",ak);

        //获取店铺的经纬度坐标
        String shopCoordinate = HttpClientUtil.doGet("https://api.map.baidu.com/geocoding/v3", map);

        JSONObject jsonObject = JSON.parseObject(shopCoordinate);
        if(!jsonObject.getString("status").equals("0")){
            throw new OrderBusinessException("店铺地址解析失败");
        }

        //数据解析
        JSONObject location = jsonObject.getJSONObject("result").getJSONObject("location");
        String lat = location.getString("lat");
        String lng = location.getString("lng");
        //店铺经纬度坐标
        String shopLngLat = lat + "," + lng;

        map.put("address",address);
        //获取用户收货地址的经纬度坐标
        String userCoordinate = HttpClientUtil.doGet("https://api.map.baidu.com/geocoding/v3", map);

        jsonObject = JSON.parseObject(userCoordinate);
        if(!jsonObject.getString("status").equals("0")){
            throw new OrderBusinessException("收货地址解析失败");
        }

        //数据解析
        location = jsonObject.getJSONObject("result").getJSONObject("location");
        lat = location.getString("lat");
        lng = location.getString("lng");
        //用户收货地址经纬度坐标
        String userLngLat = lat + "," + lng;

        map.put("origin",shopLngLat);
        map.put("destination",userLngLat);
        map.put("steps_info","0");

        //路线规划
        String json = HttpClientUtil.doGet("https://api.map.baidu.com/directionlite/v1/driving", map);

        jsonObject = JSON.parseObject(json);
        if(!jsonObject.getString("status").equals("0")){
            throw new OrderBusinessException("配送路线规划失败");
        }

        //数据解析
        JSONObject result = jsonObject.getJSONObject("result");
        JSONArray jsonArray = (JSONArray) result.get("routes");
        Integer distance = (Integer) ((JSONObject) jsonArray.get(0)).get("distance");

        if(distance > 5000){
            //配送距离超过5000米
            throw new OrderBusinessException("超出配送范围");
        }
    }
}
